Paper-bending machine.



C. W. IVIEARS.

PAPER BENDING MACHiNE.

APPLICATION FILED MAR. 14, 1913.

Patented Apr. 10, 1917.

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C. W. MEARS. PAPER BENDINGMACHINE.

APPLICATION HLED MAR. 14, 1913.

Patented Apr. 10, 1917.

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C. W. MEARS.

PAPER SENDING MACHINE.

APPLICATION FILED MAR. 14. 19:3.

Patented Apr. 10, 191?.

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C. W. MEA'RS.

PAPER BENDING MACHINE.

APPLICATION FILED MAR. 14, 1913.

Patented Apr. 10,1917.

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C. W. MEARS.

PAPER BENDING MACHINE.

APPLICATION FILED MAR. 14, I913. L gfiwo Patented Apr. 10, 1917.

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CHLES W. 'MEABS, OF CLEVELAND, OHIO.

rarER-BEianme MACHINE.

, use of paper thus treated resides in the making of books, such asmagazines and other periodicals, the leaves whereof are, by this bendingor flexing operation, provided each with a hinge adjacent to the back ofthe book, whereby a flat-opening effect is secured. In my Patent No.1,004,181, issued- September 26, 1911, there is disclosed a machine forflexing paper, and the machine of this invention has the same generalobjects in view as the aforesaid patented machine, but differs therefromin a number of features which are designed to increase the out put andpromote the efficiency of the ma chine, to enable the same to becombined with a folding machine, and to stack the paper after it hasbeen flexed. Among the general objects to be secured by this inventionare the combination of a paper flexing machine with a folding machinewherein the paper to be flexed is'folded to the desired size and toprovide a machine of this char acter with stacking mechanism cooperatingwith the flexed paper as it is delivered from the flexing mechanism.Further objects of the invention are, generally, to improve theconstruction and operation of machines of this type. More limited anddetailed objects ofthe invention will appear hereinafter and may besummarized generally as consisting of the combinations of elementsembodied inthe claims hereto annexed and illustrated in the drawingsforming part hereof wherein Figure 1 represents a side elevation of apaper bending or flexing machine constructed in accordance with myinvention, showing the same combined with the rear 0" delivery end ofapaper-folding machine; Fig. 2 a top plan view of the paper-bending orflexing machine; Fig- 3 a central vertical sectional view of the machineshown in Fig. 2: Fig. 1 a rear elevation of the machine shown in thepreceding Patented Apr. 10 191?.

Application filed march 14, 1913. Serial No. 754,279.

views, the tape-feeding rolls at the rear of the machine being omitted;Fig. 5 an elevation of the cam shaft; Figs. 6, 7, 8 and 9 elevations ofthe cams on the cam shaft and ofthe parts associated therewith; Figs. 10and 11 enlarged sectional details of the paper-clamping mechanism; Fig.12 a sectional detail of the front end of the machine as adapted for useuncombined with a paperfolding machine; Fig. 13 an end elevation, partlyin section, of the machine of Fig. 12; and Fig. 14 a sectional viewcorresponding to the line 14-14 of F ig. 10.

Describing by reference characters the various parts illustrated herein,A denotes generally the rear or delivery end of a paper-folding machine,which may be of any desired or standard type, and B denotes generally mypaper-bending or flexing machine, the front or receiving end whereof isarranged in operative relation'to the rear or delivery end of thefolding machine and adapted to receive and operate upon the paperdischarged therefrom.

The bending or flexing machine comprises a pair of upright side frames1, of suitable design to support the various mechanisms which enter intothe machine proper. These side frames are connected by means oftransverse sills 2, 3, 4:, 5 and 6 (see Fig. 3) so arranged as to formwith the said frames a rigid construction and to support the vari- 011sparts of the machine to be described hereinafter.

Projecting from the front or receiving end.

driven by the gear 12, which meshes with a large gear 13 driven by thefolding machine.

The gear 12 is preferably on the same shaft as the roller 11 and, inorder to drive the paper bending machine. the shaft carrying ing machinemay in turn be driven. Mounted on the shaft 17 is a. roller 18, and theend of the shaft opposite the sprocket 16 is projaws are then opened,the gage removed vided with a pinion 19 meshing with a large gear 20which is mounted upon and drives the cam shaft 21. Through theintermediate gears 22 and 23 and a pinion 24, a roller shaft 25 isdriven from the gear 20.

In the operation of the machine, paper discharged from the final foldingrolls of the folding machine is carried by tapes in the bending orflexing machine partly through paper clamping jaws and against a gagewhich is adjustable to vary the amount of projection of the portions ofthe leaves to be bent or flexed; the jaws are closed against the paperand are then oscillated across cooperating paper-flexing devices; the

from the path of the paper, the paper is pressed into driving engagementwith the tapes, and is conveyed thereby to a stacker. The mechanismwhereby these results are accomplished will now be described in detail.

Paper feeding mechanism.

The mechanism for feeding the paper from the front or receiving end ofthe machine to the clamping jaws and gage consists generally of two setsof tapes, with a suitable drive mechanism. The rollers 8, 9 and 18,described hereinbefore, constitute part of the feeding mechanism. Theroller 8 is driven in the direction of the arrow (see Fig. 3) throughthe chain and sprocket drive 1416, referred to hereinbefore. A suitablenumber of tapes (indicated in dotted lines at 26 in Fig. 2) extendaround the driving roller 18, under the roller 8, and around the roller9. These tapes pass around tension devices comprising rollers 27 mountedon a shaft 28 and rollers 29 on arms 30 carried by said shaft. Therollers 27 and 29 are preferably coned for the purpose of keeping thetapes in alinement. The upper branch of each tape 26 runs above therollers 27 and 29 while the lower branch passes from the bottom of thedrive roller 18 over the roller 28 and beneath the roller 29 and aroundthe roller 9, the upper branch passing beneath the roller 8.

Coiiperating with the tapes 26 is another set of tapes (indicated indotted lines at 31 in Fig. 2) and serving to carry the sheets orsignatures from the roller 18 to the clamping aws and the gage. Thetapes 31 are preferably staggered with respect to the tapes 26, four ofthe tapes 31 being shown and five of the tapes 26. The tapes 31 passaround the drive roller 18 and around rollers 32, the lower branches ofthe tapes 21 passing around tension devices 33, 34, 35,

and 36 similar to the parts27, 28, 29 and 30, respectively.

Above the tapes and coiiperating therewith in feeding the paper from theinlet or receiving end of the machine to the gage is a series of rods37. These rods are shown as located above the tapes 26 and may besecured to the cross sills 6 by means of brackets 38 and clamp screws39.

Paperbewdz'ng or flexing mechanism.

The paper bending or flexing mechanism comprises generally a pair ofnormally separated jaws through which the paper is fed by the tapes, anadjustable gage arranged to intercept the paper when fed through thejaws and to arrest the movement of the same when the ends projectthrough the jaws the desired distance, means for closing the aws uponthe paper and for reciprocating the closed jaws across a yieldinglysupported flexing device or devices, with means for automaticallyremoving the gage from the path of the paper which has just been flexed,means for unclamping the jaws, and means for bringing the paper intodriving relation with the tapes whereby it may be delivered to thestacker. As will be observed from Fig. 3, the tapes 31 pass above and inclose relation to the upper surface of the plate 40, the plate beingslotted, as shown at 41, for the rollers 32. This plate 40 is the lowermember or jaw of the paper clamping means. The rear end of this platehas a slight upward bevel, as indicated at 42 (see Fig. 10) while thelower rear edge is beveled off, as shown at 43. A downwardly projectingrib 44 is provided adjacent to the rear or delivery end of'this jaw, andthe sides of the. plate are provided with forwardly extending arms 45which are pivoted on studs 46.

Coeperating with the lower jaw is an upper jaw which comprises a plate47, shown as considerably shorter than the plate 40, but provided withthe inclined surfaces 48 and 49 and the rib 50 corresponding to theparts designated 42, 43, and 44, respectively, on the lower jaw. Theupper jaw is provided with forwardly extending arms 51 by means of whichit is also pivoted on the studs 46. The jaws are normally separated, asindicated in Figs. 3 and 10, but are adapted to be closed and oscillatedby the connections to be described hereinafter.

Located beyond the rear or delivery end of the paper clamping means is agage bar, indicated generally at 52. This gage bar is formed with aV-shaped trough or recess 53 presented toward the opening between theclamping jaws, the apex of the V being in opposition to the centralportion of the signature or group of leaves when, the jaws are closed.The function of the gage bar is to determine-the length of theprojecting paper ends which are to be bent or flexed and the particularconstruction of the trough-shaped recess is for the purpose of causing aprogressive increase in length of the hinged portions of the signatureleaves from the outer to the middle portion of the signature, as pointedout and claimed in my application'No. 679,359, filed February 23, 1912.The gage bar is threaded upon screw shafts 54 provided at their rearends with bevel gears 55 meshing with bevel gears 56 on a shaft 57havinga hand wheel 58 thereon. This construction affords convenientmeans whereby the gage bar may be adjusted toward and from the clampingjaws, as occasion may require. The shaft 57 is journaled in arms 59projecting from a squared rock shaft 60, and the shafts 54 are journaledin this rock shaft.

Located beneath the rear end of the clamping jaws is a pair of rollers61. These roll ers are journaled in the upwardly extending arms 62 of apair of angle levers, each of said levers having a rearwardly projectingarm 63 and the levers being pivoted at their angles to the side frames,as indicated at 64. The rear ends of the arms 63 are provided with rods65 having their lower ends guided in brackets 66 projecting inwardlyfrom the side frames, with springs 67 surrounding said rods. When theclamping jaws are closed and oscillated,by mechanism to be describedhereinafter, the projecting ends 68 of the leaves of. the paper mass orsignature 68 are drawn across the rollers 61, in the manner shown inFigs. 1.0 and 11. The rollers force the paper ends into contact with theouter surface of the upper aw, the rocking lever and spring constructionaffording a yielding means for enabling the rollers to press the paperagainst the outer surface of the said aw. The ribs 50 prevent therollers from passing so far beyond the rear ends of the jaw as tointerfere with the reverse movement of the jaws. After the paper hasbeen'flexed in the-reverse direction against the rollers 61 a definitehinge or bending line is established at 69 by this action. Thetightclamping of the paper in this line is facilitated by the inclination ofI the surfaces 42, 48.

In. order to close the jaws upon the paper, the upper jaw is firstpulled downwardly toward the 'lower jaw to clamp the paper, whereuponfurther downward movement of the upper jaw will cause both jaws to movedownwardl The return of the clamping jaws to no lnal position will beeffected by a. spring and, as the jaws reach their upper limit ofmovement, the upper jaw is elevated to separate the jaws and permit thepaper to be carried farther by the tapes. This operation is accomplishedby means of a cam on the cam shaft 21 operating to rock a shaft which,through interposed lever mechanism,oscillates the upper jaw. 70 denotesa pair of links having their upper ends connected to depending lugs orears carried by the upper jaw and their lower ends connected to a pairof rearwardly projecting arms 72 mounted on a rock shaft 73. 74 denotesan arm extending upwardly from this rock shaft and provided at its upperend with a roller 75 which cooperates with a cam 76 on the cam shaft 21.This cam has aflixed thereto a U shaped strap 77, and cooperating withthe strap 77 is a curved strap 78, these straps and the cam 76 formingin effect a sectional track cam.

79 denotes a pair of rods depending from the lower clamping jaw andsuitably guided at their lower ends, as by means of the transverse sill5. Each of these rods is provided with a spring 80 which is adapted toresist the downward movement of the lower jaw and to return the same andthe superposed upper jaw to normal position. When the signature or groupof sheets of paper is in place between the clamping jaws, with theprojecting ends of the paper in engagement with the gage bar 52, therotation of the cam shaft 21 rocks the shaft 73 and pulls down upon theupper jaw through the rods or links 70, closing the jaws. Furtherdownward movement of the links 70 swings the rear ends of the clampingjaws across and below the rollers 61. The spring 80 on each rod 79restores the clamping jaws to the position shown in Figs. 3 and 10, butwith the jaws unclamped. Further rotation of the shaft 21 causes thestrap 78 to engage the roller 75 and rock the shaft 73 a sufficientdistance to elevate the upper clamping jaw and thus unclamp the paper.

Meanwhile it is necessary, before the pa per may be fed to the point ofdelivery, to remove the gage bar from its path. This is accomplished byrocking the shaft 54, and this rocking of the shaft 54 is produced by acam on the cam shaft and suitable connections between the same and therock shaft 54. 81 denotes the cam on the shaft 21 and 82 a rod which isconnected at its rear end to a rock arm 83 projecting from the shaft 54(see Fig. 2). The front and lower end of the rod 82 is slotted, asindicated in dotted lines at84 (see Fig. 6) to receive the shaft 21, aroller 85 being provided on said rod to engage the cam. It will beevident that, by proper timing of the cams, the rotation of the shaft 21will cause the shaft 54 remove thegage .from the path'of the paper.

The return of the gage to normal position is -to be rocked at theappropriate period to 1-5 r ner as the cam 81 operates the shaft 54. 90

slipping beneath the paper in the clamp. In order to insure a :pro erfrictional contact between these tapes an the paper, I provide means forpressing the paper downwardly into contact with the tapes when the jawsare ened. and the gage plate is elevated. For t is purpose, a rock shaft86 is journal'ed on top of the side frame and is pro- ,vided with a pairof rearwardly projecting denotes a rod having its lower andrear endslotted, as indicated at 91 ,(see Fig. 7) to enable the rod'to bemounted upon the shaft 21 and to bereciprocated by the cam, the rodbeing provided with a roller 92 adapted "to engage the cam and havingits upper end connected to'an arm 93 projecting from the shaft 86 (seeFig. 1). For the purpose of restoring the parts to inoperative position,the shaft 86 is provided with an arm 86, and a rod 86 is connected tosaid arm and suitably guided by the frame, said rod being surrounded bya spring 86 which will positively return the parts to the position shownin Fig. 1.

When the jaws are opened and the gage bar removed, the parts are sotimed that the rollers 88 will be pressed downwardly upon the paper,securing a driving friction between the lower surface of the same andthe tapes which will insure the delivery of the paper to the stacker.

As will be evident from an inspection of Fig. 11, the paper mass orsignature 68 is of suiiicient length to enable the tapes to carry it tothe delivery rollers. These rollers com rise a the sha 25 and a pair ofupper rollers 96 carried by arms 97 which are loosely journaled upon arod 98 conveniently located above and carried by the rock shaft 54. Therollers 96 are preferably covered with rubber and, as illustrated,merely exert a gravity pressure upon the paper delivered between thesame and the roller 94. At the rearof the roller 94 is located a curvedplate 99, which curved plate serves as a guide to engage the rear end ofthe traveling mass or signature and direct the same downwardly into thefront end of a stacker box.

The stackerbox comprises a pair of vertically extending side plates 100,preferably of angle iron construction, and a pair of intermediate bottomstraps 101, suitably united, as by means of cross bars 102. I Thestacker is provided with a central post 103 having a rack 104 thereon,which rack and post are mounted in a suitableguide bracket 105, shown ascarried by the transverse sill lower roller 94 mounted on- 4. 106denotes a shaft which is squared for the application of a, leverthereto, said shaft havm a pinion 107 thereon meshing with the rac toenable the stacker box to be raised and lowered.- 108 denotes a ratchetwheel and 109 a pawl coiiperating therewith to hold the stacker box inany desired posi-v tion. The vertical movement of the stacker box isaccommodated by means of the slotted guides 110 whichcoiiperate withsuitable bolts (not shown) carried b the frame. 110 indicates anupwardly inclined back board against which a si ature 68 may rest. Thestacking of the signatures against this back board is accomplished bymeans of a reciprocating rod 111 mounted in guide sleeves 112, 113carried by brackets 114, 115, mounted on the transverse sills 2 and 5.

This rod is reciprocated by a track cam 116 on the shaft 21 (see Figs. 5and 9), the track of the cam receiving therewithin a roller 11'? carriedby the upper end of a lever 118 which is shown as pivoted to a stud 119carried by a bracket 120 carried by the transverse sill 2. The lower endof the lever 118 is connected by a link 121 with the rear endof the rod111. The front end of the rod 111 is connected to a cross head 122provided with a plurality of fingers 123 which are adapted to projectthrough the slotted bottom of the stack and to engage the signaassist inkeeping the head level. The slotted guides 110, being within the sidesof the box engage the side edges of the signatures and retain them untilthey are engaged by the fingers 123.

With the parts constructed as described, the operation will be clear. Apaper mass, such as a signature, folded by the folding machine, will bedischarged between the rollers 8 and 9 and conveyed by the tapes 26 and31 against the gage 52, the gage serving to aline the projecting ends ofthe paper in the most desirable manner. Through the connectionsdescribed, the cam shaft 21 causes the clamping jaws to close andoscillates these jaws across therollers 61, thereby fiexing the paperand producing the desired hinges in the sheets thereof. Further movementof the cam shaft positively opens .the jaws, lifts the gage bar out ofthe way of the sheets, and insures a driving friction between the paperand the tapes 31 through the pressure of the rollers 88. The paper isthen carried between the rollers 94 and 96v folding machine. The bracket7 and rollers 8 and 9 will not be provided in this case, but a table 125may be secured to the front end -of,the machine, as by means of abracket upwardly, as shown at 132, and is adapted to project above afeed roller 133 (driven from the shaft 21 by means of gears 134 and135). When the arm 130 is pushed upwardly by the cam and the rod 129, itwill rock the shaft 131 in proper direction to project the upwardlyextending end 132 of the stop into the path of the paper and prevent thesame from entering the machine. The roller 133 is shown as slotted forthe reception of the stop plate 132. Cooperating with the roller 133 arerollers 136 mounted on a shaft 137 which is carried by arms 138 rigidwith the shaft 131. 139 denotes an arm projecting forwardly from theshaft 131 and having a rod 140 connected thereto and suitably guided byone or more brackets 141 on the frame, there being a spring 142surrounding the rod and serving to rock the shaft 131, and remove thestop plate 132 from its blocking position as soon as permitted by thecam. The cam not only projects the stop plate into the path of thepaper, preventing it from entering the machine, but elevates the rollers136, allowing the paper to be inserted as far as said plate. Whenpermitted by the cam, the spring 142 removes the stop plate from thepath of the paper and rocks the rollers 13.6 into engagement with theupper surface of the paper and into frictional driving contact with thetapes 31 passing over the roller 133.

Having thus described my invention, what I claim is 1. In an apparatusof the character set forth, the combination, with a pair of clampingmembers, of paper conveying meansadapted to carry paper between andbeyond said members, a gage for limiting the projection of the paperbeyond the clamping members, means for bringing said members intoclamping engagement with the paper therebetween, means for bending orflexing the projecting ends of the clamped paper, means for separatingthe clamping members after the bending or flexing operation, means formoving the gage out of the path of the paper, and means whereby adriving connection between the paper and the conveyer may be obtainedafter the separation of the clamping members and the removal of thegage.

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' 2. In an apparatus of the character set flexing mechanism, feedrollers coiiperating therewith to convey the paper beyond saidmechanism, a stacking receptacle beyond said rollers, and means formoving the paper along said receptacle.

3. In an apparatus of the character set forth, the combination of a pairof paper clamping members, a yieldingly supported roller, means formoving the clamping members across said roller, said clamping membersbeing provided each with a lateral projection adjacent to the endproximate to said roller and adapted to engage the roller to limit themovement thereof by its yielding support. a

4. In paper bending or flexing mechanism, the combination, with a pairof paper clamping members, of a pair of roller supporting arms, a rollerjournaled in said arms in position to engage the paper projecting fromthe clamping members, arms projecting angularly from the first mentionedarms, springs coiiperating with the last mentioned arms, and means foroscillating the paper clamping members.

5. In an apparatus of the character set forth, the combination of apairhf clamping members, a paper conveyor extending between said membersand movable therebetween, means for clamping paper between said memberswith the ends projecting, means adapted to engage said projecting endsfor the purpose of bending or flexing the same, and a stop adapted tolimit the movement of the paper through the said members by theconveyer.

6. In an apparatus of the character set forth, the combination, with apair of clamping members, of a paper conveyer extending between saidmembers, means for opening and closing said members, a stop for limitingthe movement of the paper through and between said members, meansadapted to operate upon the projecting ends of the paper to flex thesame, means for moving the stop out of the path of the paper, and meansfor pressing the paper against the conveyer to enable it to be fed fromthe clamping means after the latter has been opened.

7. In an apparatus of the character set forth, the combination, with apair of clamping members, of a paper conveyer extending between saidmembers, means for opening and closing said members, a stop for limitingthe movement of the paper through and between said members, meansadapted to operate upon theprojecting ends of the paper to flex thesame, and means for moving the stop out of the path of the paper.

8. In an apparatus of the character set forth, the combination, with apair of clamping members, of means normally holding 181D paper betweensaid members, a stop adapted to limit the projection of the paper beyondsaid clamping members, a shaft, and mechanism driven by said shaft for'closingand' unclosingthe clamping members, for bending or flexing theprojecting ends of the paper, for removing the stop from the path of thepaper after the bending or flexing of the paper, and for pressing'thepaper into frictional engagement with the conveying means after saidmembers have been separated.

9. In an apparatus of the character set forth, the combination, with apair of clamping members, of means for conveying paper between saidmembers, a stop adapted to iimit the projection of the paper beyond'saidclamping members, a shaft, and mechanism driven by said shaft forclosing and unclosing the clamping members, for flexing. the projectingends of the paper while the members are closed, and for pressing thepaper into frictional engagement with the conveying means after saidmembers have been separated.

10. In an apparatus of the character set forth, the combination of apair of clamping members, an endless conveyer extending between saidmembers and adapted to convey material therebetween, means for blockingand unblocking the movement of the material by the conveyer, and meansfor forcing material into frictional engagement with the conveyer afterthe unblocking operation.

11. In an apparatus of the character setforth, the combination of a pairof clampi'ng membersnormally spaced apart, an endless conveyer extendingbetween said members, a support for said conveyer carried by one of themembers, means cooperating'with' said members to flex the paperdelivered thereto by said conveyer, and means for. oscillating themembers with respect to the cooperating flexing device.

12, In an apparatus of the character set forth, the combinatibn of apair of normally separated clamping members, an endless conveyerextending bet-ween sa1d members,

a support for said conveyer carried by oneand means for forcing saiddevice into contact with the material on the conveyer when the saidmembers are separated after oscillation.

18. In an apparatus of the character set forth, the combination of apair of clamping members, an endless conveyer extending between saidmembers, means for closing said members, a device cooperating with saidmembers to flex the-paper projecting therebeyond, means for separatingsaid members after the flexing operation, a presser device, and meansfor forcing said device into contact with the material onithe conveyerwhen the said members are separated after the flexin operation.

14. 11 an apparatus of the character set. forth, the combination of apair of normally opened clamping members, an endless conveyer extendingbetween said members, a rotary support for said conveyer carried by oneof said members, a rock shaft carried by the opposite member, an armprojecting from said rock shaft, a roller on said arm, means for closingsaid members, means for oscillating the closed members, a devicecooperating with the oscillating members to flex the paper projectingtherebeyond, means for opening said members after such oscillation, andmeans operative upon the separation of said members for rocking theshaft to force the roller into contact with the paper on said conveyer.

of said members and movable toward and from the endless conveyer, a cam,an? connections between said cam and-the p;.esser device for moving thesame toward the conveyer.

16. In an apparatus of the character set forth, the combination of apair of clamping members, means for opening and closing the same, meansfor conveying paper into and through said members, a stop bar on thedelivery side of said members, means cooperating with the clampingmembers to flex the paper projecting beyond the latter, a rock shaftsupporting said stop, and means for automatically rocking the shafttofmove the stop from register with the dis- -charge ends of the clampingmembers when the'latter are opened after their oscillating movement.

17. In an apparatus of the character set forth, the combination of apair of clam-p ing members, means for feeding paper into and through thesame, means for opening and closing said" members, means cotiperatingwith said members to flex the paper pro jecting through the deliveryends thereof, a

rock shaft, a gage supported by said shaft and adjustable toward andfrom the discharge ends of the clamping members, and means forrockingsaid shaft to'move the members,

naaanaa gage out of alinement with the delivery end of said members whenthey are opened after the paper flexing operation.

18. In an apparatus of the character set forth, the combination of apair of clamping means for feeding paper through and beyond saidmembers, means for closing said members, means cooperating with the saidmembers to flex the paper projecting therebeyond, means for opening saidmembers after the paper flexing operation, a rock shaft, screw shaftsjournaled in said rock shaft, a gage mounted on the threaded portions ofsaid shafts, and arranged to intercept the paper which is fed throughthe clamping members to limit its projection therebeyond, means forrocking said shaft, and means carried by said shaft for rotating thescrew shafts.

19:11; an apparatus of the character set forth, the combination of apair of clamping members, means for feeding paper through and beyondsaid members, means for closing said members, means cooperating withsaid members for flexing the ends of the paper projecting therebeyond,means for opening said members after the flexing operation, a rockshaft, a gage carriedby said rock shaft and adapted to be moved therebyinto and out of blocking relation to the paper projecting beyond thedelivery ends of the clamping members, a driving roller located at therear of the gage, arms pivotally supported from the rock shaft, rollerscarried by said arms and cooperating with the drive roller, and a curvedplate'behind said rollers.

20. In an apparatus of the character set forth, the combination of apair of clamping members, means for feeding paper through and beyondsaid members, means for closing said members, members for flexing theends of the paper projectin therebeyond, means for opening said mem ersafter the flexing operation, a rock shaft, a gage carried by said rockshaft and adapted to be moved thereby into and out of blocking relationto the paper projecting beyond the delivery end of the clamping members,a driving roller located at the rear of the gage, arms pivotallysupported from the rock shaft, and rollers carried by said arms andcooperating with the drive roller.

21. In. an apparatus of the character setforth, the combination of apair of clamping members each pivotally supported at one end thereof, anendless conveyer extending between said members, a rotary support forand forcing it toward the opposite member,

meansconnected with the otherpme nber for blocking device from meanscooperating with said- Pr j ct mentioned member and for rocking both Imembers on their pivots against the action of the spring, a devicecooperating with said members to flex the paper projecting beyond thedelivery end thereof during the oscillation of said members, and meansfor moving the second member away from'thefirst member at the end of theoscillating movement.

22. In an apparatus ofvthe character set forth, the combination, withpaper bending or flexing mechanism, of a conveyer for carrying paper tosaid mechanism, a roller adapted to deliver material to said conveyer, adevice extending on the delivery side of said roller and adapted toblock the feed of material therebeyond, and means for automaticallyremoving the blocking device from the path of the paper.

23. In an apparatus of the character set forth, the combination, withpaper bending or flexing mechanism, of a conveyer for carrying paper tosaid mechanism, means for driving said conveyer, block the feed ofmaterial by said conveyer, and means for automatically removing theproximity to the conveyer and the path of the-paper.

24. In an apparatus for flexing paper, the combination, with paperbending or flexing mechanism, of a roller, an endless conveyer driven bysaidroller for carrying the paper to the said mechanism, a rock shaft, amember carried by said shaft and adapted to be projected into and out ofthe path of the paper on the delivery side of said roller, a shaft, acam thereon, connections whereby said cam may operate the rock shaft,and a spring for operating the rock shaft in oppositionto the cam. V

25. In an apparatus of the character set forth, the combination, withpaper bending or flexing mechanism, of a roller at the inlet end of saidapparatus, means for driving the roller, conveying tapes extending fromthe roller to the flexing mechanism,.a rock shaft, an arm connected withsaid rock shaft and having a projection adapted to extend between thetapes and into the path of the paper carried thereby, a shaft, meansdriven by the shaft for operating said arm arms from the rock shaft, ashaft supported by said arms'above the roller, and rollers mounted onthe last-mentioned shaft. In testimony whereof, I hereunto aflix mysignature in the presence of two witnesses.

o -mnrns w. amass.

Witnesses:

BRENNAN B. Wear,

